Applied Mechanics and Materials Vol. 394

Abstract: This paper adopts finite element method to carry out simulation analysis for Enzitan reinforced concrete U-shaped aqueduct. Deducing variation law of the aqueducts stress and displacement in construction process and operational process, researching the rationality of aqueduct structure design scheme. Analysis results show that, Enzitan reinforced concrete aqueduct structure is reasonable, force of aqueduct structure is explicit, it meets the requirements for design.

Abstract: Using an improved response surface method analyzed the board of reliability on the elastic half space model. Considered the random of the larger variability parameters, such as foundation, board, load, the paper studied the reliability of this issue application of the response surface method of quadratic polynomials. This paper analyzed the influence of the random parameter variability on the reliability index β and failure probability. Comparison result shows that the convergence of the iteration of this paper is improved than the general response surface method , structural analysis to further reduce the number and improve the computational efficiency, obtained some useful conclusions and had some engineering referencing.

Abstract: This paper adopts universal finite element calculation software to carry out force analysis for Nanping trench-buried inverted siphon,computer is applied in analysis of trench-buried inverted siphon. Deducing variation law of the inverted siphons stress and displacement in construction process and operational process. The calculation results further shown design schemes rationality and safety. which provide reliable reference of design and construction for the trench-buried inverted siphon.

Abstract: In order to study on the advanced detection technology and the sensitivity of the fallen geological structure based on induce polarization method, the hazards of the fallen geological structure before the driving face of coal roadway are analysed. A simplified physical model of the structure is established, which is converted to an equivalent circuit easy to study. Then an induce polarization model of the fallen geological structure is established. And the induce polarization (IP) model is connected with the simulation detection model of geological abnormal mass and the variation curves of the apparent resistivity and value of the fallen geological structure under the induce polarization mode are obtained. The curves obtained show that the parameters of simulation detection results and the electrical parameters pre-set by the induce polarization model would be the same basically. Therefore the basic idea of the electric method detection is verified and the feasibility presupposition could be provided for the development of the coal (rock) excited polarization effect base on the advanced detection instruments with the electric method.

Abstract: The related researches show that , the sunshine temperature field can cause the changes of the natural frequencies of the simply-supported beam. In order to recover the influence law of the temperature field on the natural frequencies, the calculation method of the natural frequencies of the simply-supported beam bridge is formed. First, according to the principles of stress equivalence, transform the sunshine temperature field to the partiality axis forces. Based on the Bernoulli model, the calculation method of the natural frequencies of the simply-supported beam under the partiality axis forces at both ends is formed. At last, take one simply-supported T beam as the object of numerical modeling and verify the validity and the reliability of this method.

Abstract: Applying grey theory into the monitoring prediction of surrounding strata deformation in underground roadway either can overcome the problems that various uncertain factors affect the prediction of strata deformation rule, or can provide the theory base for rational roadway supporting.

Abstract: This study shows structural behaviors of an innovative space truss typed temporary structure which is effectively used to maintenance and repairs of road tunnels. This evaluated structure has merits to carry out maintenance works of tunnels without blocking cars and transportations. Numerical modeling and analytical testing of the space truss system are investigated by using a commercial engineering program, i.e., ABAQUS 6.5-1, and then it are verified that the truss system takes both structural safety and effective function for maintenances and repairs of road tunnels.

Abstract: The dam is a important structure in hydraulic key project, this paper adopts universal finite element calculation software to carry out three-dimensional finite element simulation analysis for clay core wall stone slag dam of Fushengqiao reservoir. Computer is fully used in calculation process, researching variation law of the dams stress and displacement in construction process and operational process. The research results offer some reference for design and construction of clay core wall stone slag dam.

Abstract: This paper adopts general finite element software to carry out three-dimensional finite element simulation analysis for Sunjiagou reinforced concrete U-shaped beam-supported aqueduct. Considering five combination cases in aqueducts construction and operational process, researching variation laws of the aqueducts stress and displacement. Analysis results show that design scheme of Sunjiagou reinforced concrete U-shaped beam-supported aqueduct is reasonable, it can meet design requirements. Analysis results provide some theory references for design of reinforced concrete U-shaped beam-supported aqueduct.

Abstract: Through analyzing bitumen residuum concrete inclined wall rockfill dam structures mechanical characteristics in construction process and operational process, this paper adopts finite element method to carry out structural analysis for bitumen residuum concrete inclined wall rockfill dam of Fengguo reservoir. Deducing distribution law of the dams stress and displacement in construction process and operational process. Analysis results show that, bitumen residuum concrete inclined wall rockfill dam construction of Fengguo reservoir is reasonable, it meets the requirements for design.